Put them in a deep pan, add the chicken stock, salt to taste, and add a cup of water.
Boil until the lentils are soft.
Add more water if required.
While the lentils are boiling, heat a griddle or heavy-bottomed flat pan on a medium flame and dry roast all the spices (except the turmeric and nutmeg) until they begin to release their aroma.
Remove from the fire, cool, and then grind to a fine powder in a dry coffee or spice grinder.
Mix in the turmeric and nutmeg and blend well. Set aside.
When the lentils are cooked soft, whisk them to get a smooth and thick soup-like consistency. Set aside.
Heat the cooking oil in a pan on a medium flame and when hot, add the fresh coriander, fenugreek, and mint leaves.
Fry till soft. Remove from the fire and cool.
Grind into a smooth paste in a food processor.
Heat a deep, heavy-bottomed pan on a medium flame and add the lentils, ginger, garlic, and tamarind pastes and bring to a boil, stirring frequently to prevent sticking.
The consistency should always be like a medium-thick soup.
Add a cup of water, the spice powder, coriander-fenugreek-mint paste you made earlier, salt if required, and the chicken pieces. Mix well.
Simmer and cook till chicken is done.
Add more water to maintain consistency.
Serve Dhansak hot with Parsi brown rice and a Kachumbar salad.